Rotor



FIG. 1 is a perspective view of the rotor, showing top and side views of the new design;

FIG. 2 is a top plan view of the rotor of FIG. 1;

FIG. 3 is a bottom plan view of the rotor of FIG. 1; and,

FIG. 4 is an enlarged side elevation view of the rotor of FIG. 1. 

The ornamental design for a rotor, as shown and described. 